反应详情

A reaction mixture consisting of 29.8 gm. (0.102 mole) of 2-carbomethoxy-4-(p-chlorophenyl)-4-cyanocyclohexanone (prepared in Part b, above), 550 ml. glacial acetic acid, and 330 ml. 10 percent sulfuric acid is heated on a steam bath at about 100° C. for 24 hours. The mixture is stirred continuously. After cooling, the mixture is diluted with 1000 ml. water, and extracted with benzene. The benzene phase is recovered and washed successively with water, with aqueous sodium bicarbonate, and with brine. The benzene is then removed by evaporation under reduced pressure to give a solid residue. The solid residue is recrystallized from diethyl ether to give 12.13 gm. (82% yield) of 4-(p-chlorophenyl)-4-cyanocyclohexanone having a melting point at 94.5° to 97° C.

1. temperatureAfter cooling
2. additionthe mixture is diluted with 1000 ml
3. extractionwater, and extracted with benzene
4. customThe benzene phase is recovered
5. washwashed successively with water, with aqueous sodium bicarbonate
6. customThe benzene is then removed by evaporation under reduced pressure
7. customto give a solid residue
8. customThe solid residue is recrystallized from diethyl ether
9. customto give 12.13 gm